Multifunctional tobacco leaf winnowing and impurity removing equipment

Abstract

The application provides a multifunctional tobacco winnowing and impurity removing device, which comprises a winnowing mechanism, a material dropping mechanism, a conveying mechanism, a light impurity screening mechanism and a heavy impurity screening mechanism. The winnowing mechanism comprises a container in the shape of a bowl with a bottom end, a hot air vortex is introduced into the bottom end of the container and gradually shrinks upwards, and a discharge port is arranged at the top end of the container. The material dropping mechanism is connected to the discharge port. The conveying mechanism is used for feeding materials into the container. The heavy impurity screening mechanism is arranged around the hot air vortex and located at the bottom end of the container. The light impurity screening mechanism comprises a conductive cotton thread with one end introduced into the container and the other end introduced into a de-electrization collection box. The conductive cotton thread can rotate and move between the container and the de-electrization collection box. A power supply block is arranged in the rotating path of the conductive cotton thread. The conductive cotton thread can also rotate horizontally relative to the container. The device can remove light impurities and heavy impurities in the same process, does not affect the removal efficiency, has high integration degree and reduces the occupied area.

Description

Technical Field

[0001] This invention relates to the field of wind separation and impurity removal technology for tobacco leaves in the tobacco industry, and more specifically, to a multifunctional wind separation and impurity removal device for tobacco leaves. Background Technology

[0002] Tobacco leaf winnowing, as an important process for removing light and heavy impurities from tobacco leaves and ensuring the purity of tobacco leaves, has always been one of the key steps in the process flow.

[0003] Currently, both domestically and internationally, the separation of light and heavy impurities is done separately. Light impurities are mainly removed using air separation equipment, while heavy impurities are mainly removed using roller screens.

[0004] In addition, the tobacco leaves that undergo winnowing are usually moist and need to be dried later.

[0005] These problems contradict the current upgrade strategy of intensive and miniaturized equipment, and there are no suitable products in other wind separation technology fields that can be directly applied.

[0006] For example, the utility model patent with application number 202121541225X, entitled "An Electrostatic Air Separation Device for Plastic Components in Straw-Based Vegetable Waste," discloses the use of a fan and an electrostatic adsorber to adsorb and separate small plastic waste mixed in with the vegetable waste. However, firstly, it can only adsorb light impurities and cannot remove heavy impurities in the same process; secondly, the contact between the electrostatic adsorber and the vegetable waste is very limited, resulting in a low adsorption degree; and thirdly, the vegetable waste is dried, so the electrostatic adsorption process is unimpeded.

[0007] In addition, cyclone separators, which are commonly used in the field of air separation and impurity removal, can only be used to remove heavy impurities. Light impurities and materials are transported to the next process at the same time. Usually, equipment such as electrostatic precipitators are used to perform secondary adsorption of light impurities. This process cannot be completed in a single process, and it is also difficult to handle moist materials such as tobacco leaves.

[0008] Even if hot air is integrated into the cyclone separator for drying and electrostatic adsorption devices are integrated for adsorbing light impurities, the dried tobacco leaves are often in a high position and their travel path is usually close to the inner wall under the action of centrifugal force. At this time, it is difficult to set the position of electrostatic adsorption. If it is set in the center, it is too far away from the tobacco leaves, and if it is set in the outer area, it will hinder the normal operation of the cyclone separator, resulting in extremely poor integration effect and no application prospect.

[0009] In summary, the current tobacco leaf winnowing system has the following problems:

[0010] 1. The removal of both light and heavy impurities cannot be completed in one process; multiple processes are required, resulting in low efficiency.

[0011] 2. The conventional winnowing equipment used in other fields can only solve part of the problem;

[0012] 3. The conventional winnowing equipment used in the traditional field is integrated with light impurities, heavy impurities and drying functions, and there is a problem of poor integration effect.

[0013] Therefore, in order to shorten the winnowing process, improve the efficiency, and reduce the occupied space, a new winnowing equipment is needed, which can complete the separation of light impurities and heavy impurities in tobacco in one equipment. SUMMARY

[0014] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a multifunctional tobacco winnowing and impurity removing equipment which can complete the removal of light impurities and heavy impurities in the same process, does not affect the removal efficiency, has high equipment integration and reduces the occupied area.

[0015] The basic design concept of the present application is that, due to the limitations of traditional winnowing equipment, such as the lack of light impurity removal in cyclone dust collector and the lack of heavy impurity removal in conventional electrostatic adsorption equipment, and the difficulty of integration and optimization, this scheme is designed.

[0016] The buckle bowl-shaped container is used as the winnowing main body, and the hot air exhaust fan blows upward to form an inverted tornado. The inverted tornado has at least three advantages. First, the centrifugal force is used to separate and throw out the heavy impurities. Second, the tobacco and cotton thread are heated and dried, and are in a loose state, so that the light impurities and heavy impurities inside are more easily separated. The cotton thread is kept in the best dry state. Third, the material is gathered to the center, which cannot be completed by the cyclone separator, and the light impurities are removed by the action of the conductive cotton thread with static electricity.

[0017] The top material falling mechanism has three main functions of providing negative pressure cold air flow. The first is to provide negative pressure, improve the pressure difference, and ensure sufficient ascending power. The second is to provide temperature difference, which can cause steam to be quickly discharged, avoiding affecting the winnowing. The third is to guide the airflow direction, making it easier to form an inverted tornado and more smooth to discharge.

[0018] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a multifunctional tobacco winnowing and impurity removing equipment, comprising a winnowing mechanism, a material falling mechanism, a conveying mechanism, a light impurity screening mechanism and a heavy impurity screening mechanism.

[0019] The winnowing mechanism comprises a buckle bowl-shaped container with a large bottom and a small top, and a transition of an outer arc in the middle. The bottom of the container introduces hot air tornado which gradually shrinks upward. The top of the container is provided with a discharge port.

[0020] The material falling mechanism is connected to the discharge port and provides active negative pressure cold air flow.

[0021] The conveying mechanism is used to send materials into the container;

[0022] The heavy impurity screening mechanism is arranged around the hot air whirlwind and at the bottom end of the container to obtain heavy impurities separated by centrifugal force.

[0023] The light impurity screening mechanism includes a conductive cotton thread leading into the container interior at one end and leading into the de-electrization collection box at the other end. The conductive cotton thread at the one end in the container interior is located in the middle and upper gathering area of the hot air whirlwind. The conductive cotton thread can rotate between the container interior and the de-electrization collection box. The conductive cotton thread is loaded with a power supply block in the rotating path. The conductive cotton thread as a whole also performs a rotating motion in the horizontal direction relative to the container.

[0024] As described above, the profile outer end of the conductive cotton thread at the one end in the container interior does not exceed the outer end of the material rolled up by the hot air whirlwind.

[0025] As described above, the one end of the conductive cotton thread in the container interior is supported by a ring-shaped support. The outer side of the ring-shaped support is provided with a wire groove. The conductive cotton thread is partially embedded in the wire groove.

[0026] As described above, the conductive cotton thread is long-fiber cotton thread. The diameter of the long-fiber cotton thread after swelling under the action of static electricity is greater than the diameter of the ring-shaped support.

[0027] As described above, the bottom end of the ring-shaped support is fixed to a rotating shaft. The bottom end of the rotating shaft is driven to rotate by a rotating drive mechanism. The rotating shaft is provided with a cotton thread through hole. The de-electrization collection box is located below the rotating shaft. The de-electrization collection box is provided with an electric pulley inside. The conductive cotton thread is in a ring shape. The conductive cotton thread passes through the cotton thread through hole and is supported by the ring-shaped support and the electric pulley to form a static adsorption mechanism that can continuously rotate. The power supply block is arranged in the cotton thread through hole. The de-electrization collection box is provided with a light impurity removal unit.

[0028] As described above, the light impurity removal unit includes an air inlet opened at one side of the lower end of the de-electrization collection box and an air outlet arranged at one side of the upper end of the de-electrization collection box. The air outlet is connected with a light impurity collection mechanism.

[0029] As described above, the bottom end of the container is provided with a hot air exhaust fan. The hot air exhaust fan is isolated from the interior space of the container by a separation net above the hot air exhaust fan. The outer end of the hot air exhaust fan is higher than the inner end to form a whirlwind.

[0030] As described above, the heavy impurity screening mechanism includes a ring-shaped conveying belt arranged around the separation net and located at the bottom end of the container interior. The end of the ring-shaped conveying belt corresponds to the lower end surface of the container and is provided with a heavy impurity discharge outlet.

[0031] As described above, the blanking mechanism comprises a whistle-shaped cavity, an inlet, a suction pump, a suction pipeline and an outlet, the planar side of the whistle-shaped cavity is provided with the inlet communicating with the discharge port of the container, the suction pump is connected to the inside of the whistle-shaped cavity through the suction pipeline, the end of the suction pipeline is closed, uniformly perforated on the side and provided with a filter screen, and the outlet is arranged at the blowout port of the whistle-shaped cavity.

[0032] As described above, the conveying mechanism comprises a conveying belt, the conveying belt is provided with a partition plate for rationing, and the inner end of the conveying belt extends to the projection area of the hot air exhaust fan.

[0033] The multifunctional tobacco air separation and impurity removal device has the following advantages compared with the prior art:

[0034] 1. In one process of air separation and impurity removal, the removal of light impurities and heavy impurities is completed, and the influence of tobacco humidity is solved.

[0035] 2. Different from the traditional cyclone separator, the inverted wind rolling mode is adopted, which can gather the tobacco material, the temperature of the hot air is also gathered after gathering, the tobacco drying and moisture removal can be accelerated, the contact between the material and the light impurity screening mechanism is more sufficient, and the light impurities are more easily removed, the centrifugal principle is also used to make the heavy impurities separate outward under the action of their own weight, the purification of the tobacco is realized, and the long lint cotton thread is dried to keep a dry and fluffy state, and the maximum effect is achieved.

[0036] 3. Due to the influence of the weight of the tobacco itself on the inverted wind rolling mode, in order to solve the problem, a negative pressure device is added at the blanking mechanism, the negative pressure provides part of the suction force, the hot air rolling below provides part of the blowing force, and the temperature difference formed by the heat below and the cold air at the top end forms the thermal lift, the three act on the transmission of the tobacco, effectively overcome the gravity of the tobacco itself, so that the tobacco can smoothly enter the blanking space.

[0037] 4. Due to the integration of multiple functions, the volume of the equipment is greatly reduced, the integration is greatly increased, especially in the intensive requirement or laboratory scene, and has great popularization and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is an internal structure diagram of the multifunctional tobacco air separation and impurity removal device.

[0039] Figure 2 It is one of the overall structure diagrams of the multifunctional tobacco air separation and impurity removal device.

[0040] Figure 3 It is an internal top view of the container of the multifunctional tobacco air separation and impurity removal device.

[0041] Figure 4 Figure 2 is a schematic diagram of the overall structure of the multifunctional tobacco wind selection and impurity removal device.

[0042] In the figure: 1. Container; 2. Discharge port; 3. Hot air exhaust fan; 4. Isolation net; 5. Dropping mechanism; 6. Whistle-shaped cavity; 7. Suction duct; 8. Outlet; 9. Conveyor belt; 10. Partition plate; 11. Ring-shaped conveyor belt; 12. Heavy impurity discharge port; 13. Conductive cotton thread; 14. De-electricity collection box; 15. Power supply block; 16. Ring-shaped support; 17. Rotation shaft; 18. First driving motor; 19. Cotton thread perforation; 20. Electric pulley; 21. Air inlet; 22. Air suction port. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described in further detail below through specific embodiments.

[0044] As shown in Figures 1-4 , a multifunctional tobacco wind selection and impurity removal device includes a wind selection mechanism, a dropping mechanism, a conveying mechanism, a light impurity screening mechanism, and a heavy impurity screening mechanism.

[0045] The wind selection mechanism includes a container 1 in the shape of a bowl with a large bottom end, a small top end, and a circular arc transition in the middle. The bottom end of the container 1 introduces hot air rolling wind that gradually shrinks upwards. The top end of the container is provided with a discharge port 2.

[0046] Specifically, the bottom end of the container 1 is installed with a hot air exhaust fan 3. The hot air exhaust fan 3 is isolated from the internal space of the container 1 by an isolation net 4 above. The outer end height of the hot air exhaust fan 3 is greater than the inner end height to form rolling wind. The direction of the rolling wind matches the position of the discharge port 2, so that the tobacco material can easily be discharged from the discharge port 2.

[0047] The dropping mechanism 5 is connected to the discharge port 2 and provides a positive negative pressure cold air flow. Specifically, the dropping mechanism includes a whistle-shaped cavity 6, an inlet, a suction pump, a suction duct 7, and an outlet 8. The planar side of the whistle-shaped cavity 6 is provided with an inlet that communicates with the discharge port 2 of the container. The suction pump is connected to the inside of the whistle-shaped cavity 6 through the suction duct 7. The end of the suction duct 7 is closed, uniformly perforated on the side, and has a built-in filter screen. The outlet 8 is at the blowout port of the whistle-shaped cavity.

[0048] The structure of the whistle-shaped cavity 6 itself has the effect of making the entering tobacco fully release rotational force, enabling the tobacco to quickly and stably overflow to the conveyor belt below along the structural shape of the whistle-shaped cavity 6. It is similar to a buffer cavity structure on a path.

[0049] The conveying mechanism is used for feeding materials into the container, and specifically, the conveying mechanism comprises a conveying belt 9, the conveying belt 9 is provided with a partition plate 10 for quantitative distribution, and the inner end of the conveying belt 9 extends to the projection area of the hot air exhaust fan 3; the partition plate 10 on the conveying belt 9 can distribute the materials into equal components and quantitatively feed them into the winnowing mechanism, so that the winnowing mechanism can complete the task in a relatively stable working state and prevent the interference of the materials.

[0050] The heavy impurity screening mechanism is arranged around the hot air cyclone and at the bottom end of the container, and is used for obtaining the heavy impurities separated by the centrifugal force; specifically, the heavy impurity screening mechanism comprises a ring-shaped conveying belt 11 arranged around the isolation net and at the inner bottom end of the container, and a heavy impurity discharge port 12 is arranged at the end of the ring-shaped conveying belt 11 corresponding to the lower end surface of the container; under the action of the centrifugal force, the stones and other objects separated are separated away by the ring-shaped conveying belt 11.

[0051] The light impurity screening mechanism comprises a conductive cotton thread 13 introduced into the container at one end and introduced into the electricity-removing collection box at the other end; the conductive cotton thread 13 is located at the middle upper gathering area of the hot air cyclone at the one end in the container, which is mainly to improve the drying effect of the hot air on the tobacco and reduce the adsorption interference of the conductive cotton thread.

[0052] The profile outer end of the one end of the conductive cotton thread 13 in the container 1 does not exceed the outer end of the material rolled by the hot air cyclone, so that the conductive cotton thread 13 can fully contact the material and contact the light impurities in the material.

[0053] The conductive cotton thread 13 can make rotary motion between the container 1 and the electricity-removing collection box 14, and a power supply block 15 is loaded in the rotary path of the conductive cotton thread 13; the conductive cotton thread 13 also makes horizontal rotary motion relative to the container 1.

[0054] Specifically, the one end of the conductive cotton thread 13 in the container 1 is supported by a ring-shaped support 16, the outer side of the ring-shaped support 16 is provided with a wire groove, and the conductive cotton thread 13 is partially embedded in the wire groove; the conductive cotton thread 13 is long-fiber cotton thread, and the diameter of the long-fiber cotton thread after swelling under the action of static electricity is greater than the diameter of the ring-shaped support 16, so as to expand the adsorption area.

[0055] The rotating driving structure adopts the following structure: the bottom end of the annular support 16 is fixed on the rotating shaft 17, the bottom end of the rotating shaft 17 is driven to rotate by a rotating driving mechanism, i.e., a first driving motor 18 and a gear set, a cotton thread through hole 19 is arranged on the rotating shaft 17, the electricity-removing collection box 14 is located below the rotating shaft 17, an electric pulley 20 is arranged inside the electricity-removing collection box 14, the conductive cotton thread 13 is annular, the conductive cotton thread 13 passes through the cotton thread through hole 19 and is supported by the annular support 16 and the electric pulley 20 to form a static electricity adsorption mechanism capable of continuously self-rotation, the power supply block 15 is arranged in the cotton thread through hole 19, a light impurity removing unit, such as an ion fan, is arranged in the electricity-removing collection box 14, the ion fan can be directly applied to an air path constructed by an air inlet 21 and an air outlet 22, in addition, in order to fully remove the adsorption effect, an additional scraper mechanism can be added to scrape off the impurities. The light impurity removing unit includes the air inlet 21 opened on one side of the lower end of the electricity-removing collection box and the air outlet 22 arranged on one side of the upper end of the electricity-removing collection box, and the air outlet is connected with a light impurity collection mechanism.

[0056] Working principle:

[0057] The conveying belt 9 successively inputs the equalized tobacco leaves into the sorting mechanism, the hot air exhaust fan 3 inside the sorting mechanism forms an inverted rolling wind in the container 1, the tobacco leaves are gathered and moved upwards under the action of the rolling wind, the hot air blows the tobacco leaves relatively loose on one hand, facilitating the discharge of the heavy impurities, light impurities and water vapor inside, on the other hand, the water vapor inside evaporates under the action of heat, and the tobacco leaves are dried.

[0058] The tobacco leaves dried to a certain degree have a reduced adsorption capacity for the heavy impurities and light impurities, the heavy impurities are thrown to the inner wall of the container 1 under the action of centrifugal force, fall into the annular conveying belt 11, and are finally discharged from the heavy impurity discharge outlet 12, and a material receiving mechanism can be installed below.

[0059] A part of the tobacco leaves or light impurities entering the annular conveying belt 11 area due to air flow disturbance will form a negative pressure in this area under the action of the rolling wind, and the tobacco leaves or light impurities are again rolled into the rolling wind and taken away, and the annular conveying belt 11 provides a buffer correction allowance.

[0060] The conductive cotton thread 13 has static electricity under the action of the power supply block 15 in the process of continuous rotation, the static electricity makes the fluff expand, increases the contact area with the light impurities, completes the adsorption of the light impurities, and enters the electricity-removing collection box 14 with the rotating action, the static electricity is removed in the electricity-removing collection box 14, the light impurities fall off, and are taken away under the action of the air flow formed by the air inlet 21 and the air outlet 22.

[0061] The tobacco products and moisture are taken into the whistle-shaped cavity 6 under the joint action of the hot rolling wind and the negative pressure wind from the top, after the power of the rolling wind is released in the whistle-shaped cavity 6, the tobacco products and moisture are slowly discharged from the outlet 8 and taken away by the downstream conveying belt.

[0062] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application; although the present application has been described in detail with reference to the preferred embodiments, it is understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, all of them should be covered in the technical solution range of the present application claimed by the present application.

Claims

1. A multifunctional tobacco leaf air separation and impurity removal device, characterized in that: The wind selection mechanism, the blanking mechanism, the conveying mechanism, the light impurity screening mechanism and the heavy impurity screening mechanism are included. The wind selection mechanism includes a container in the shape of a bowl with a large bottom end, a small top end and a circular arc transition in the middle part. The blanking mechanism is connected to the discharge port and provides a positive negative pressure cold air flow. The conveying mechanism is used to send materials into the container. The heavy impurity screening mechanism is arranged around the hot air vortex and located at the bottom end of the container to obtain heavy impurities separated by centrifugal force. The light impurity screening mechanism includes a conductive cotton thread leading into the container on one end and leading into a de-electrification collection box on the other end.

2. The multifunctional tobacco leaf winnowing and impurity removing equipment according to claim 1, characterized in that: The conductive cotton thread is located in the middle and upper part of the hot air vortex in the container.

3. The multifunctional tobacco leaf winnowing and impurity removing equipment according to claim 2, characterized in that: The conductive cotton thread is supported by a ring-shaped support.

4. The multifunctional tobacco leaf winnowing and impurity removing equipment according to claim 3, characterized in that: The bottom end of the ring-shaped support is fixed to a rotating shaft.

5. The multifunctional tobacco leaf winnowing and impurity removing equipment according to claim 4, characterized in that: The bottom end of the rotating shaft is driven to rotate by a rotating drive mechanism.

6. The multifunctional tobacco leaf winnowing and impurity removing equipment according to claim 5, characterized in that: The rotating shaft is provided with a cotton thread perforation. The de-electrification collection box is located below the rotating shaft. The de-electrification collection box is provided with an electric pulley inside. The conductive cotton thread is in a ring shape. The conductive cotton thread passes through the cotton thread perforation and is supported by the ring-shaped support and the electric pulley to form a static adsorption mechanism that can continuously rotate. The power supply block is arranged in the cotton thread perforation. The de-electrification collection box is provided with a light impurity removal unit. The bottom end of the container is provided with a hot air exhaust fan. The hot air exhaust fan is isolated from the container interior space by a isolation net. The outer end of the hot air exhaust fan is higher than the inner end to form a vortex. The light impurity removal unit includes an air inlet opened on one side of the lower end of the de-electrification collection box and an air outlet arranged on one side of the upper end of the de-electrification collection box. The air outlet is connected with a light impurity collection mechanism. The blanking mechanism includes a whistle-shaped cavity, an inlet, a suction pump, a suction pipeline and an outlet. The flat side of the whistle-shaped cavity is provided with an inlet connected to the discharge port of the container. The suction pump is connected to the inside of the whistle-shaped cavity through the suction pipeline. The end of the suction pipeline is closed, uniformly perforated on the side and has a filter screen inside. The outlet is located at the blowout of the whistle-shaped cavity. The conveying mechanism includes a conveying belt provided with a partition plate for quantification. The inner end of the conveying belt extends into the projection area of the hot air exhaust fan.

Images